[linux-lvm] Quick Question RE Snapshots

Larry Dickson ldickson at cuttedge.com
Tue Oct 27 16:32:59 UTC 2009

In my experience yes - if you are doing long sequential writes, snapshot
turns them into random IO. If you were doing short random writes to begin
with, then snapshot should not have such a huge relative effect, because the
non-snapshot performance is already slow.

Larry Dickson
Cutting Edge Networked Storage

On 10/27/09, Ryan Anderson <ryan at worldspice.net> wrote:

> I'm sure this has been covered before, but I didn't see it in the
> archive: Is a near 90% drop in write performance "normal" snapshot
> behavior? If so, :(
> If not, are there any good resources I should be looking at? Every
> search I perform comes up with one of two types of articles on the matter:
> 1) Snapshots are  awesome! They let you...(list of really nifty things)
> 2) Snapshots suck! My system is completely useless while they're active!
> --
> Ryan Anderson
> (901) 843 9300
> Systems Engineer
> WorldSpice Technologies
> _______________________________________________
> linux-lvm mailing list
> linux-lvm at redhat.com
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> read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
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